From: Wolfram Sang Date: Wed, 9 Aug 2017 19:00:41 +0000 (+0200) Subject: mmc: renesas_sdhi: use extra flag for CBSY usage X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5124b59202eb3118eba5ac2222dc00f3390549a8;p=linux.git mmc: renesas_sdhi: use extra flag for CBSY usage There is one SDHI instance on Gen2 which does not have the CBSY bit. So, turn CBSY usage into an extra flag and set it accordingly. This has the additional advantage that we can also set it for other incarnations later. Signed-off-by: Wolfram Sang Tested-by: Chris Brandt Reviewed-by: Simon Horman Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index dd215723fa431..2dea4039c0917 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -429,7 +429,7 @@ static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr) case CTL_TRANSACTION_CTL: case CTL_DMA_ENABLE: case EXT_ACC: - if (host->pdata->flags & TMIO_MMC_MIN_RCAR2) + if (host->pdata->flags & TMIO_MMC_HAVE_CBSY) bit = TMIO_STAT_CMD_BUSY; /* fallthrough */ case CTL_SD_CARD_CLK_CTL: @@ -588,6 +588,10 @@ int renesas_sdhi_probe(struct platform_device *pdev, if (ret < 0) goto efree; + /* One Gen2 SDHI incarnation does NOT have a CBSY bit */ + if (sd_ctrl_read16(host, CTL_VERSION) == SDHI_VER_GEN2_SDR50) + mmc_data->flags &= ~TMIO_MMC_HAVE_CBSY; + /* Enable tuning iff we have an SCC and a supported mode */ if (of_data && of_data->scc_offset && (host->mmc->caps & MMC_CAP_UHS_SDR104 || diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 3a82577420406..f905f2361d12f 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -72,7 +72,8 @@ static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = { static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = { .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | - TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2, + TMIO_MMC_CLK_ACTUAL | TMIO_MMC_HAVE_CBSY | + TMIO_MMC_MIN_RCAR2, .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | MMC_CAP_CMD23, .bus_shift = 2, diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c index 718cb8a9d2ce8..9b77f521cd2c2 100644 --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c @@ -58,7 +58,8 @@ static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = { static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = { .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | - TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2, + TMIO_MMC_CLK_ACTUAL | TMIO_MMC_HAVE_CBSY | + TMIO_MMC_MIN_RCAR2, .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | MMC_CAP_CMD23, .dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES, @@ -78,7 +79,8 @@ static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = { static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = { .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | - TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2, + TMIO_MMC_CLK_ACTUAL | TMIO_MMC_HAVE_CBSY | + TMIO_MMC_MIN_RCAR2, .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | MMC_CAP_CMD23, .bus_shift = 2, diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h index 18b17a39d465e..b572955e6de6a 100644 --- a/include/linux/mfd/tmio.h +++ b/include/linux/mfd/tmio.h @@ -107,6 +107,9 @@ */ #define TMIO_MMC_CLK_ACTUAL BIT(10) +/* Some controllers have a CBSY bit */ +#define TMIO_MMC_HAVE_CBSY BIT(11) + int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base); int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base); void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state);